EP 3643690 A4 20210317 - OPTICAL GLASS AND OPTICAL COMPONENT
Title (en)
OPTICAL GLASS AND OPTICAL COMPONENT
Title (de)
OPTISCHES GLAS UND OPTISCHE KOMPONENTE
Title (fr)
VERRE OPTIQUE ET ÉLÉMENT OPTIQUE
Publication
Application
Priority
- JP 2017123207 A 20170623
- JP 2018022804 W 20180614
Abstract (en)
[origin: EP3643690A1] Provided is an optical glass that has a high refractive index and a good light transmittance, exhibits high solubility during continuous melting, and has good manufacturing properties. This optical glass has a refractive index (n<sub>d</sub>) of 1.64 or more, a P value within the range of 7.0 <P value<10.0, and 91% or greater internal transmittance converted to 10 mm thickness at all of the following wavelengths: 450 nm, 550 nm, 650 nm, and 750 nm. The P value is represented by formula (1): P value = log(A<sub>450</sub>×P<sub>450</sub>+A<sub>550</sub>×P<sub>550</sub>+A<sub>650</sub>×P<sub>650</sub>+A<sub>750</sub>×P<sub>750</sub>) wherein A<sub>450</sub>, A<sub>550</sub>, A<sub>650</sub>and A<sub>750</sub>are absorbances of the optical glass at wavelengths of 450 nm, 550 nm, 650 nm, and 750 nm when the thickness is 10 mm, and P<sub>450</sub>, P<sub>550</sub>, P<sub>650</sub>and P<sub>750</sub>are radiances determined according to Planck's radiation law at wavelengths of 450 nm, 550 nm, 650 nm, and 750 nm.
IPC 8 full level
C03C 3/064 (2006.01); C03C 3/066 (2006.01); C03C 3/068 (2006.01); C03C 3/093 (2006.01); G02B 1/00 (2006.01)
CPC (source: EP US)
C01G 53/04 (2013.01 - US); C03C 3/064 (2013.01 - EP); C03C 3/066 (2013.01 - EP); C03C 3/068 (2013.01 - EP); C03C 3/093 (2013.01 - EP); C03C 4/0092 (2013.01 - US); C03C 4/08 (2013.01 - US); C04B 35/12 (2013.01 - US); G02B 1/11 (2013.01 - EP US); G02B 6/0065 (2013.01 - US)
Citation (search report)
- [X] JP 2009073674 A 20090409 - NIPPON ELECTRIC GLASS CO
- [XD] JP 2017032673 A 20170209 - NIPPON ELECTRIC GLASS CO & EP 3330754 A1 20180606 - NIPPON ELECTRIC GLASS CO [JP]
- [X] EP 2452926 A1 20120516 - NIPPON ELECTRIC GLASS CO [JP]
- [X] WO 2010038597 A1 20100408 - OHARA KK [JP], et al
- [X] WO 2012029563 A1 20120308 - NIPPON ELECTRIC GLASS CO [JP], et al
- [X] EP 2218694 A1 20100818 - OLYMPUS CORP [JP]
- [X] WO 2008126792 A1 20081023 - OLYMPUS CORP [JP], et al
- [X] WO 2016148026 A1 20160922 - ASAHI GLASS CO LTD [JP]
- See references of WO 2018235725A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3643690 A1 20200429; EP 3643690 A4 20210317; CN 110869329 A 20200306; JP 2022089966 A 20220616; JP 2022089967 A 20220616; JP 2023126854 A 20230912; JP 7371722 B2 20231031; JP WO2018235725 A1 20200423; TW 201904899 A 20190201; TW I754076 B 20220201; US 11554985 B2 20230117; US 2020123044 A1 20200423; WO 2018235725 A1 20181227
DOCDB simple family (application)
EP 18820033 A 20180614; CN 201880041929 A 20180614; JP 2018022804 W 20180614; JP 2019525531 A 20180614; JP 2022069457 A 20220420; JP 2022069458 A 20220420; JP 2023106288 A 20230628; TW 107121266 A 20180621; US 201916717867 A 20191217